Ford Focus MK3 Transit Fiesta Manifold Air MAP Pressure Sensor AG919F479AB

Ford Focus MK3 Transit Fiesta Manifold Air MAP Pressure Sensor is a component from the Air and fuel intake sensors group, responsible for precise pressure measurement in the intake manifold and the proper operation of the fuel system. A correctly selected MAP sensor allows the engine control unit to dose fuel stably, which translates into smooth engine operation and predictable throttle response. This solution is dedicated to popular Ford models, such as the Focus, Transit, or Fiesta, where reliability and repeatability of parameters are essential.

Specifications and technical data

• SKU: AG919F479AB
• Mark: Ford
• Condition: Used
• OEM Part Number: AG919F479AB
• Substitutable numbers: AG919F479AB, AG91-9F479-AB, 0261230309, 0 261 230 309
• Category: Air Intake & Fuel Sensors

Function and application of the MAP sensor

The manifold absolute pressure (MAP) sensor in a Ford is responsible for converting actual air pressure into an electrical signal transmitted to the engine control unit. Based on this data, the ECU selects the fuel dose, ignition timing, and turbocharging strategy, which has a direct impact on engine refinement, dynamics, and fuel consumption.

In vehicles such as the Focus MK3, Transit, or Fiesta, a properly functioning MAP sensor is particularly important for:

• maintaining stable idle speed,
• smooth response to acceleration and downshifting,
• reducing smoke and power drops under load,
• diagnosing potential errors related to the intake system.

Benefits of using an original Ford sensor

The offered component comes from the Ford line, which means maintaining factory operating characteristics and full electrical compatibility with the vehicle's wiring. In practice, this translates into:

• proper cooperation with the factory engine control unit without the need for adaptation,
• appropriate signal characteristics across the entire operating pressure range,
• stable operating parameters under typical operating conditions.

The element from this group is particularly recommended when replacing a damaged sensor, especially when symptoms such as rough engine operation, power loss, or a check engine light appear. Using a component with factory specifications helps restore correct reading values without the risk of measurement discrepancies.

Product characteristics and condition

The presented sensor belongs to the Air and fuel intake sensors category and is designed for installation in the intake manifold in selected Ford models. The design is based on an integrated pressure transducer and an electrical connector matched to the vehicle's wiring harness, which facilitates installation and minimizes the risk of incorrect connection.

The product is offered in used condition, which allows for an economical replacement of the component while maintaining compliance with factory parameters. Before installation, it is recommended to perform a standard check of the manifold socket and the seal to ensure the tightness of the intake system and repeatability of measurements.

Selection and vehicle compatibility

To correctly select the sensor for a specific car, it is worth verifying compatibility with the OEM part number and available interchangeable numbers in the service documentation or the manufacturer's catalog. This ensures that the offered component will work with the specific engine version and model year of the vehicle.

In case of doubts regarding the selection of used electronics and sensors, a guide describing the principles of choosing and verifying such components may be helpful – detailed tips can be found in the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?, which discusses the practical aspects of using used electronic components in cars.

Expansion of the intake system in a Ford

If you are planning a comprehensive repair or upgrade of the engine area in your Ford and need other elements from the same group, such as additional pressure sensors, air temperature sensors, or measuring elements in the fuel system, check the available parts in the Ford air and fuel intake sensors category.